Capping jig

Abstract

A cover sealing jig comprises a tube shell carrier, a cover plate carrier and a fixing device, the tube shell carrier comprises a tube shell groove and is used for limiting and fixing a tube shell, the cover plate carrier comprises a cover plate groove and is used for limiting and fixing a cover plate, and the tube shell carrier and the cover plate carrier are detachably covered and mutually pressed through the fixing device; the cover plate carrier is provided with a vacuum adsorption mechanism, the vacuum adsorption mechanism is communicated with the cover plate groove, and the cover plate can be adsorbed on the cover plate carrier through the vacuum effect; a spring force application mechanism acting on the cover plate is further arranged in the cover plate carrier, and when the tube shell carrier and the cover plate carrier are closed in a covering mode, the cover plate carrier compresses the spring force application mechanism so that pressure can be applied to the cover plate through the spring force application mechanism, and the cover plate can be tightly pressed on the tube shell. The cover sealing jig is reasonable in design, easy to manufacture and convenient to maintain, can shorten the development period and reduce the production cost, and can be used as a substitute of a professional cover sealing machine before mass production.

Description

Technical Field

[0001] This utility model relates to the field of chip packaging technology, and in particular to a sealing fixture. Background Technology

[0002] In the field of integrated circuit packaging, common packaging forms include ceramic packaging and plastic packaging. For example, in the ceramic packaging process of radio frequency power devices, the capping process mostly uses a shell and a cover plate. The shell is used for the arrangement of various chips and bonding wires to realize the circuitry with specific functions, while the cover plate wraps around the shell. Whether the cover plate is coated with adhesive or has solder pads, its function is to provide physical protection for the shell and prevent the influence of external environment such as dirt, impact, moisture, and temperature. Therefore, the key points of capping are robustness, airtightness, and universality.

[0003] Currently, there are two main methods for capping tube shells. The first is manual capping, and the second is capping using a professional capping machine. The manual capping process generally involves: first, using tools such as tweezers, placing the cap plate with adhesive or solder pads directly above the tube shell to locate its position; then, using clamps to hold the tube shell and cap plate together top and bottom. The clamps provide sufficient elastic pressure to ensure the adhesive or solder pads continue to adhere to the tube shell after melting; finally, placing it on a heating table or in an oven for baking. The oven temperature profile can be set according to the cap plate type to achieve the best curing effect. After baking, the tube shell and cap plate will be firmly bonded together. The disadvantages of manual capping are: relying on visual inspection and touch for cap placement results in large positional deviations; the pressure applied to the cap plate cannot be quantified; accidental contact by the user can cause damage; manual operation is inefficient; and manual operation cannot be used for mass production. The capping process of a professional capping machine is generally as follows: First, the tube shell is placed into the tube shell fixing slot of the capping machine, and the correct position of the tube shell is confirmed. Then, the cover plate with adhesive coating or welding sheet is placed into the cover plate fixing fixture of the capping machine, and the correct placement of the cover plate is confirmed. Finally, the carriers on both sides of the tube shell and cover plate are closed, and the programmed procedure is run. Although professional capping machines solve the problems of low efficiency and low yield of manual capping, they still have disadvantages such as complex structure, inconvenient mold replacement, and high design, manufacturing, and maintenance costs.

[0004] Therefore, improving capping efficiency and economy while ensuring capping quality is a technological problem that engineers and technicians urgently need to solve. Summary of the Invention

[0005] To address the issues of low efficiency and low yield of manual capping, and the high cost of professional capping machines, a simple, convenient, efficient, and low-cost capping fixture is proposed.

[0006] This utility model provides a sealing fixture, including a shell carrier, a cover plate carrier, and a fixing device. The shell carrier includes a shell groove for limiting and fixing the shell, and the cover plate carrier includes a cover plate groove for limiting and fixing the cover plate. The shell carrier and the cover plate carrier are detachably closed and pressed tightly against each other by the fixing device. The cover plate carrier is provided with a vacuum adsorption mechanism, which communicates with the cover plate groove and can adsorb the cover plate onto the cover plate carrier through vacuum. The cover plate carrier is also provided with a spring force application mechanism acting on the cover plate. When the shell carrier and the cover plate carrier are closed, the cover plate carrier compresses the spring force application mechanism to apply pressure to the cover plate, so that the cover plate is pressed tightly against the shell.

[0007] This capping fixture is rationally designed, simple to manufacture, and easy to maintain. It can shorten the development cycle and reduce production costs, and can serve as a substitute for professional capping machines before mass production. In use, the cap carrier is inverted, and the cap is placed in the cap groove. After placement, a vacuum is activated, and the cap is firmly adsorbed onto the cap carrier by a vacuum adsorption mechanism. The cap carrier is then flipped over and aligned with the tube housing carrier before being pressed down to seal. The sealed fixture is then placed in an oven for baking. A spring-loaded mechanism continuously applies downward pressure to the cap, further tightening the cap and tube housing, ensuring that the adhesive or welding sheet continues to adhere to the tube housing after melting, thus completing the capping process.

[0008] The vacuum adsorption and spring pressure design makes the capping process extremely convenient, significantly improving capping efficiency compared to traditional manual capping, achieving the same efficiency as professional capping machines. Furthermore, the overflow of adhesive or welding sheets can be controlled by the pressure applied by the spring force mechanism, eliminating concerns about accidentally damaging the product inside the tube, resulting in a high yield rate. At the same time, compared to professional capping machines, this invention has a simple structure and low cost. By customizing the size and shape of the cap plate groove and tube shell groove, and flexibly combining multiple capping fixtures, it can achieve small-batch, uninterrupted, multi-product processing. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the tube carrier in the sealing fixture of this utility model;

[0010] Figure 2 This is a schematic diagram of the cover plate carrier in the sealing fixture of this utility model;

[0011] Figure 3 This is an exploded view of the cover plate carrier in the sealing fixture of this utility model;

[0012] Figure 4 for Figure 2 The diagram shows the bottom surface of the cover plate carrier;

[0013] Figure 5 for Figure 2The diagram shows the cross-section and a partially enlarged view of the cover plate carrier. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the sealing fixture includes a shell carrier 100 and a cover plate carrier 200. The shell carrier 100 includes a shell groove 115 for limiting and fixing the shell; its shape is the same as the bottom of the shell used for sealing. The shell is fixed by being placed in the shell groove 115. The cover plate carrier 200 includes a cover plate groove 205 for limiting and fixing the cover plate; its shape is the same as the bottom of the cover plate used for sealing. The cover plate is fixed by being placed in the cover plate groove 205. The shell carrier 100 and the cover plate carrier 200 are detachably closed by a fixing device, specifically a buckle 140, located on the outer edge of the shell carrier 100 and the cover plate carrier 200, for fixing the shell carrier 100 and the cover plate carrier 200 and ensuring that they are tightly pressed together after being closed. The cover plate carrier 200 is equipped with a vacuum adsorption mechanism, which is connected to the cover plate groove 205. The cover plate can be adsorbed onto the cover plate carrier 200 by vacuum action. The cover plate carrier 200 is also equipped with a spring force application mechanism that acts on the cover plate. When the tube shell carrier 100 and the cover plate carrier 200 are closed, the cover plate carrier 200 compresses the spring force application mechanism to apply pressure to the cover plate, so that the cover plate is pressed tightly against the tube shell.

[0016] In use, invert the cover plate carrier 200 and place the cover plate in the cover plate groove 205. After placement, turn on the vacuum, and the vacuum adsorption mechanism will firmly adsorb the cover plate onto the cover plate carrier 200. Flip the cover plate carrier 200 and press it down on the tube shell carrier 100 so that the buckle 140 locks in place. Turn off the vacuum. At this time, the spring force mechanism applies pressure to the cover plate, pressing the cover plate tightly against the tube shell. Place the sealed sealing fixture in an oven for baking. The spring force mechanism continues to apply downward pressure to the cover plate, further pressing the cover plate and tube shell together, ensuring that the adhesive or welding sheet continues to adhere to the tube shell after melting, thus completing the sealing.

[0017] The cover plate carrier 200 specifically includes a cover plate carrier body 300 and a fixing plate 500. The cover plate carrier body 300 is tightly fitted with the outer edge of the fixing plate 500 and has a cavity in the middle. The fixing plate 500 is fixedly connected to the cover plate carrier body 300 through fixing screw holes 510 and carrier screw holes 330.

[0018] The vacuum adsorption mechanism includes a vacuum plug hole 505 on the fixed plate 500 for inserting and removing the vacuum plug 515; a vacuum pipe port 320 is provided on the cover plate carrier body 300 opposite the vacuum plug hole 505, and a vacuum hole 325 is provided on the cover plate carrier body 300 opposite the pressure piston 405.

[0019] The spring force application mechanism includes a pressure spring 400 and a pressure piston 405 disposed between the cover plate carrier body 300 and the fixed plate 500. The bottom surface of the fixed plate 500 is elastically connected to the pressure piston 405 through the pressure spring 400. The pressure piston 405 is in close contact with the inner edge of the vacuum hole 325. A piston through hole 410 is opened in the middle of the pressure piston 405. The end of the pressure piston 405 protrudes from the bottom surface of the vacuum hole 325.

[0020] To more clearly describe the structure of the vacuum adsorption mechanism and the spring force application mechanism in the cover plate carrier 200, a cross-sectional view and a partial enlarged view of the assembled cover plate carrier 200 are provided here. Figure 5 As shown, when the pressure piston 405 is not subjected to other external forces, the pressure spring 400 is in a compressed or uncompressed state, and the end of the pressure piston 405 protrudes from the bottom surface of the vacuum hole 325. When an upward pressure is applied to the pressure piston 405, the piston can slide up and down along the vacuum hole 325. The cover plate carrier body 300 is tightly fitted to the outer edge of the fixed plate 500, and a narrow cavity is left in the middle of the fixed plate 500. The vacuum plug hole 505 and the vacuum pipe port 320 are connected to the vacuum hole 325 through the cavity.

[0021] In use, the cover plate carrier 200 is inverted so that the cover plate groove 205 faces upward. The cover plate is placed into the cover plate groove 205, and the external vacuum equipment is activated. The air between the cover plate and the cover plate carrier 200 is extracted along the direction of piston through hole 410 → vacuum hole 325 → cavity → vacuum plug hole 505, and the cover plate is firmly attached to the cover plate carrier 200. When the carrier closes the cover, the cover plate contacts the tube shell, causing the pressure spring 400 to contract and apply downward pressure to the pressure piston 405 and the cover plate.

[0022] The pressure applied by the spring force-applying mechanism can be quantified by the specification of the pressure spring 400, ensuring that the overflow effect of the adhesive or welding sheet under pressure is controllable, and avoiding product damage caused by uneven force or excessive or insufficient force during manual operation. This achieves precise and efficient capping, improves the yield rate, and reduces labor costs.

[0023] The pressure piston 405 has an annular stepped engagement design at its end with the vacuum port 325. Specifically, this includes an annular engagement step 335 at the end of the vacuum port 325 and a groove 415 at the end of the pressure piston 405 that engages with the engagement step 335. The height of the groove 415 is greater than the height of the engagement step 335. This annular stepped engagement design improves the airtightness of the vacuum port 325 when the cover plate is attached to the cover plate carrier 200 and prevents the piston from slipping out of the vacuum port 325.

[0024] The casing carrier 100 has first positioning pin holes 105 on both sides for installing the main body component 130 of the positioning pin; the cover plate carrier 300 has second positioning pin holes 310 on both sides opposite to the first positioning pin holes 105 for installing the insertion component 135 of the positioning pin. Simultaneously, the four corners of the casing carrier 100 and the cover plate carrier 200 respectively have carrier support spring holes 120 and 305 for installing carrier support springs 125. The casing carrier 100 has snap-fit ​​screw holes 110 on both sides, and the cover plate carrier 200 has snap-fit ​​notches and snap-fit ​​component screw holes 315 on corresponding positions on both sides for installing and engaging the snap-fit ​​140.

[0025] After the cover plate is attached to the cover plate carrier 200, the carrier is inverted again so that the cover plate groove 205 faces downwards. The cover plate carrier 200 is then pressed down from above, aligned with the tube housing carrier 100 via the positioning pins. The latches naturally lock in place. The vacuum tube is then removed, and the two combined carriers are placed in the oven. The sealing fixture in this embodiment has a square structure with positioning pins at all four corners. This restricts the relative displacement between the tube housing carrier 100 and the cover plate carrier 200, ensuring alignment and more precise positioning of the tube housing and cover plate. When the upper and lower carriers are combined, the carrier support spring 125 compresses to provide elastic force against the closing action, providing cushioning and preventing deformation or misalignment caused by rigid contact of the carriers. Simultaneously, the carrier support spring 125 at each of the four corners of the sealing fixture ensures even pressure distribution on the contact surface between the cover plate and the tube housing, further improving the sealing quality.

[0026] Furthermore, the main body of the sealing fixture is manufactured using processes such as electroplating, spraying, and anodizing, possessing characteristics such as high strength, high temperature resistance, corrosion resistance, and surface antistatic properties. It can withstand the high temperatures and stresses during baking and meets the antistatic requirements of semiconductor manufacturing processes. The tube shell groove 115 and the cover plate groove 205 can be customized according to the size and shape of the tube shell and cover plate, achieving a universal design that can adapt to the production of different products.

[0027] The described capping fixture is rationally designed, simple to manufacture, and easy to maintain, shortening the development cycle and reducing production costs. It can serve as a replacement for capping machines before mass production. The design, featuring vacuum adsorption, spring piston pressure, positioning pin alignment, and snap-fit ​​clamping, makes the capping process highly convenient. Overflow of adhesive or welding sheets is controllable, eliminating concerns about accidentally damaging the product inside the tube. Compared to traditional manual capping, capping efficiency is significantly improved, achieving the same efficiency as professional capping machines. By customizing the groove size and shape, multiple capping fixtures can be combined to achieve small-batch, uninterrupted, multi-product processing.

Claims

1. A sealing fixture, characterized in that, The device includes a shell carrier, a cover plate carrier, and a fixing device. The shell carrier includes a shell groove for limiting and fixing the shell, and the cover plate carrier includes a cover plate groove for limiting and fixing the cover plate. The shell carrier and the cover plate carrier are detachably closed and pressed together by the fixing device. The cover plate carrier is equipped with a vacuum adsorption mechanism, which communicates with the cover plate groove and can adsorb the cover plate onto the cover plate carrier through vacuum. The cover plate carrier also has a spring force application mechanism that acts on the cover plate. When the shell carrier and the cover plate carrier are closed, the cover plate carrier compresses the spring force application mechanism to apply pressure to the cover plate, so that the cover plate is pressed tightly against the shell.

2. The sealing fixture according to claim 1, characterized in that, The cover plate carrier includes a cover plate carrier body and a fixing plate fixedly connected to the cover plate carrier body. The cover plate carrier body is tightly fitted with the outer edge of the fixing plate and has a cavity in the middle. The vacuum adsorption mechanism includes a vacuum plug hole opened on the fixing plate for inserting and removing a vacuum plug. A vacuum pipe opening is opened on the cover plate carrier body directly opposite the vacuum plug hole. A vacuum hole penetrating the cover plate carrier body is opened in the middle of the cover plate groove. The vacuum plug hole and the vacuum pipe opening are connected to the vacuum hole through the cavity.

3. The sealing fixture according to claim 2, characterized in that, The spring force application mechanism includes a pressure spring and a pressure piston disposed between the cover plate carrier body and the fixed plate. The bottom surface of the fixed plate is elastically connected to the pressure piston through the pressure spring. The pressure piston is in close contact with the inner edge of the vacuum hole. A piston through hole is opened in the middle of the pressure piston. The end of the pressure piston protrudes from the bottom surface of the vacuum hole.

4. The sealing fixture according to claim 3, characterized in that, The end of the vacuum hole is provided with an annular engagement step, and the end of the pressure piston is provided with a groove that engages with the engagement step. The height of the groove is greater than the height of the engagement step.

5. The sealing fixture according to claim 1, characterized in that, The fixing device is a buckle.

6. The sealing fixture according to claim 1, characterized in that, The shell carrier and the cover plate carrier are provided with positioning pins at corresponding positions, so that when the shell carrier and the cover plate carrier are closed, the groove of the shell is aligned with the groove of the cover plate.

7. The sealing fixture according to claim 6, characterized in that, There are at least two locating pins.

8. The sealing fixture according to claim 1, characterized in that, The shell carrier and the cover carrier are equipped with carrier support springs at corresponding positions. When the shell carrier and the cover carrier are closed, the carrier support springs provide elastic force that resists the closing action.

9. The sealing fixture according to claim 8, characterized in that, The sealing fixture is square in shape, with support springs at each of the four corners.

10. The sealing fixture according to claim 1, characterized in that, There are multiple recesses in the tube shell and the cover plate, arranged in an array.

Images